I can honestly say it would be the Mello Souls for me. It's one of the best if not the best Northern Soul dancer for me. Frank Wilson has never evoked the same reaction or "wow" factor that the Mello Souls has, even upon first hearing. Don't get me wrong it's top notch northern but just doesn't hold the same appeal as the Mello Souls. Now if you'd said Judy Street..... . I also rate Butch's Diane Lewis far more highly than Frank Wilson, a close second IMHO behind Mello Souls.